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CN-122024653-A - Pixel circuit of display panel, driving method of pixel circuit and display panel

CN122024653ACN 122024653 ACN122024653 ACN 122024653ACN-122024653-A

Abstract

The application discloses a pixel circuit of a display panel, a driving method of the pixel circuit and the display panel. The pixel circuit comprises a target charging passage, wherein a first end of the target charging passage is connected with a data line, a second end of the target charging passage is connected with a first node in the pixel circuit, the target charging passage is parallel to an original charging passage in the pixel circuit, the target charging passage and the original charging passage charge an original compensation capacitor through the first node at the same time in a charging stage, the target charging passage is also used for charging the target compensation capacitor in the charging stage, and the target compensation capacitor is used for reducing the leakage current influence of the pixel circuit in a light-emitting stage.

Inventors

  • ZHANG LIQIN
  • WANG JUE

Assignees

  • 联想(北京)有限公司

Dates

Publication Date
20260512
Application Date
20260331

Claims (10)

  1. 1. A pixel circuit of a display panel, comprising: The first end of the target charging path is connected with the data line, the second end of the target charging path is connected with a first node in the pixel circuit, the target charging path is parallel to an original charging path in the pixel circuit, and the target charging path and the original charging path charge an original compensation capacitor through the first node at the same time in a charging stage; the target charging path is also used for charging the target compensation capacitor in the charging stage; the target compensation capacitor is used for reducing the leakage current influence of the pixel circuit in the light emitting stage.
  2. 2. The pixel circuit of claim 1, wherein the target compensation capacitance and the original compensation capacitance act during a light emitting phase to reduce a leakage current effect of the pixel circuit.
  3. 3. The pixel circuit of claim 2, wherein the target compensation capacitance provides a target voltage greater than the original voltage provided by the original compensation capacitance, producing a compensation current that flows to the first node in the target charge path.
  4. 4. A pixel circuit according to claim 1 or 3, The target charging path comprises at least a first transistor and a second transistor; A second node is arranged between the first transistor and the second transistor, and the target compensation capacitor is connected to the second node; charging the target compensation capacitor through the second node in the charging stage; In the light emitting stage, the compensation current flows from the second node to the first node in the target charging path, and the compensation current flows to the transistor of the pixel circuit, which leaks in the light emitting stage, through the first node.
  5. 5. The pixel circuit of claim 4, wherein during the charging phase, the second transistor is turned off before the first transistor such that the amount of power obtained by the target compensation capacitance is greater than the amount of power obtained by the original compensation capacitance.
  6. 6. A driving method of a pixel circuit of a display panel, the method comprising: In the charging stage, the original compensation capacitor is charged through the parallel target charging path and the original charging path in the pixel circuit, and the target charging path also charges the target compensation capacitor, wherein the target compensation capacitor is used for reducing the leakage current influence of the pixel circuit in the light-emitting stage.
  7. 7. The method of claim 6, the method further comprising: in the charging stage, the target voltage provided by the target compensation capacitor is larger than the original voltage provided by the original compensation capacitor to generate a compensation current; During the light emitting phase, the compensation current flows to the first node at the target charging path.
  8. 8. The method of claim 1 or 7, the target charging path comprising at least a first transistor and a second transistor, a second node being disposed between the first transistor and the second transistor, the target compensation capacitance being connected to the second node, the method further comprising: charging the target compensation capacitor through the second node in the charging stage; In the light emitting stage, the compensation current flows from the second node to the first node in the target charging path, and the compensation current flows to the transistor of the pixel circuit, which leaks in the light emitting stage, through the first node.
  9. 9. The method of claim 8, the method further comprising: in the charging stage, the second transistor is turned off before the first transistor, so that the electric quantity obtained by the target compensation capacitor is larger than the electric quantity obtained by the original compensation capacitor.
  10. 10. A display panel comprising a pixel matrix of a plurality of pixel cells, each of the pixel cells having a pixel circuit comprising: The first end of the target charging path is connected with the data line, the second end of the target charging path is connected with a first node in the pixel circuit, the target charging path is parallel to an original charging path in the pixel circuit, and the target charging path and the original charging path charge an original compensation capacitor through the first node at the same time in a charging stage; the target charging path is also used for charging the target compensation capacitor in the charging stage; the target compensation capacitor is used for reducing the leakage current influence of the pixel circuit in the light emitting stage.

Description

Pixel circuit of display panel, driving method of pixel circuit and display panel Technical Field The present application relates to the field of electronic technologies, and in particular, to a pixel circuit of a display panel, a driving method thereof, and a display panel. Background The existing pixel circuit has a low charging speed, and the charging time cannot be shortened any more because the charging path is fixed and single, so that the refresh rate is difficult to further improve. Disclosure of Invention The embodiment of the application aims to provide a pixel circuit of a display panel, a driving method thereof and the display panel. In a first aspect, an embodiment of the present application provides a pixel circuit of a display panel, including: The first end of the target charging path is connected with the data line, the second end of the target charging path is connected with a first node in the pixel circuit, the target charging path is parallel to an original charging path in the pixel circuit, and the target charging path and the original charging path charge the original compensation capacitor through the first node at the same time in a charging stage; the target charging path is also used for charging the target compensation capacitor in the charging stage; The target compensation capacitor is used for reducing the leakage current influence of the pixel circuit in the light emitting stage. In some embodiments, the target compensation capacitance and the original compensation capacitance act in the light-emitting phase to reduce the leakage current effect of the pixel circuit. In some embodiments, the target voltage provided by the target compensation capacitor is greater than the original voltage provided by the original compensation capacitor to generate a compensation current, and the compensation current flows to the first node in the target charging path. In some embodiments, the target charging path includes at least a first transistor and a second transistor; a second node is arranged between the first transistor and the second transistor, and the target compensation capacitor is connected to the second node; in the charging stage, charging the target compensation capacitor through the second node; in the light emitting stage, a compensation current flows from the second node to the first node in the target charging path, and the compensation current flows to the transistor of the pixel circuit which leaks in the light emitting stage through the first node. In some embodiments, during the charging phase, the second transistor is turned off before the first transistor, so that the amount of power obtained by the target compensation capacitor is greater than the amount of power obtained by the original compensation capacitor. In a second aspect, an embodiment of the present application provides a method for driving a pixel circuit of a display panel, including: In the charging stage, the original compensation capacitor is charged through the parallel target charging path and the original charging path in the pixel circuit, and the target charging path also charges the target compensation capacitor, wherein the target compensation capacitor is used for reducing the leakage current influence of the pixel circuit in the light-emitting stage. In some embodiments, the method further comprises: in the charging stage, the target voltage provided by the target compensation capacitor is larger than the original voltage provided by the original compensation capacitor to generate a compensation current; During the light emitting phase, the compensation current flows to the first node in the target charging path. In some embodiments, the target charging path includes at least a first transistor and a second transistor, a second node is disposed between the first transistor and the second transistor, and the target compensation capacitor is connected to the second node, the method further comprising: in the charging stage, charging the target compensation capacitor through the second node; in the light emitting stage, a compensation current flows from the second node to the first node in the target charging path, and the compensation current flows to the transistor of the pixel circuit which leaks in the light emitting stage through the first node. In some embodiments, the method further comprises: in the charging stage, the second transistor is turned off before the first transistor, so that the electric quantity obtained by the target compensation capacitor is larger than the electric quantity obtained by the original compensation capacitor. In a third aspect, an embodiment of the present application provides a display panel including a pixel matrix formed of a plurality of pixel units, each pixel unit having a pixel circuit including: The first end of the target charging path is connected with the data line, the second end of the target charging path is connected with a first node in the pi